| Williamsport to Collegno | 4,069.06 mi (6,548.52 km) |
| Williamsport to Cologno al Serio | 4,141.89 mi (6,665.73 km) |
| Williamsport to Cologno Monzese | 4,126.06 mi (6,640.25 km) |
| Williamsport to Colorno | 4,193.20 mi (6,748.30 km) |
| Williamsport to Comacchio | 4,277.11 mi (6,883.34 km) |
| Williamsport to Comiso | 4,679.15 mi (7,530.36 km) |
| Williamsport to Como | 4,108.39 mi (6,611.81 km) |
| Williamsport to Concordia Sagittaria | 4,266.31 mi (6,865.96 km) |
| Williamsport to Concorezzo | 4,126.39 mi (6,640.78 km) |
| Williamsport to Conegliano | 4,239.26 mi (6,822.42 km) |
| Williamsport to Conselice | 4,269.04 mi (6,870.36 km) |
| Williamsport to Conselve | 4,244.73 mi (6,831.23 km) |
| Williamsport to Conversano | 4,627.81 mi (7,447.74 km) |
| Williamsport to Copertino | 4,695.79 mi (7,557.15 km) |
| Williamsport to Copparo | 4,255.26 mi (6,848.18 km) |
